Description
Technical Specifications
| Specification | Details |
|---|---|
| Brand | GE / GE Fanuc Intelligent Platforms |
| Part Number | 8920-PS-DC |
| Product Type | Intrinsically Safe DC Power Supply Module |
| Product Family | MTL8000 / PAC8000 Process I/O |
| Primary Function | Supplies DC power to intrinsically safe I/O modules |
| Nominal Input | 24 VDC |
| Input Voltage Range | 18.5–36 VDC |
| Output Voltage | 12 VDC |
| Output Capacity | 5 A |
| Module Capacity | Up to 8 IS modules according to GE’s product catalog |
| Redundancy | Supports load-sharing / redundant operation |
| Carrier | 8724-CA-PS |
| Input Connection | Duplicated 2-part screw terminals |
| Maximum Cable Size | 2.5 mm² |
| Dimensions | Approx. 84 × 110 × 160 mm |
| Unit Weight | Approx. 1.29 kg |
| Shipping Weight | Approx. 2.3 kg |
| Operating Temperature | −40 to +70 °C under the documented hazardous-area certification |
| Hazardous-Area Status | Intrinsically safe system component |
| Certification | IECEx and ATEX certification documentation exists for the 8920-PS-DC system |
| Lifecycle | Discontinued / legacy |
| Firmware | None; power-supply module |
| Country of Origin | Verify for the actual unit |
GE’s 2008 product catalog identifies 8920-PS-DC as the IS Module DC Power Supply for 8 modules, while detailed MTL documentation gives the electrical, dimensional, and weight data above.
Product Overview
The 8920-PS-DC converts an external 24 VDC nominal supply into regulated 12 VDC power for intrinsically safe MTL8000 I/O modules. The documented input range is 18.5–36 VDC, with a 5 A output capacity.
The module is installed on the dedicated 8724-CA-PS power-supply carrier. Multiple 8920-PS-DC units can be used in a load-sharing arrangement, and an additional module can provide N+1 redundancy where required.
GE 8920-PS-DC
Electrical Characteristics
| Parameter | Value |
|---|---|
| Nominal input voltage | 24 VDC |
| Input range | 18.5–36 VDC |
| Output voltage | 12 VDC |
| Maximum output current | 5 A |
| 18.5 V input | 4.1 A input at full-load condition |
| 24 V input | 3.3 A input at full-load condition |
| 36 V input | 2.1 A input at full-load condition |
| Efficiency at 18.5 V | 76% |
| Efficiency at 24 V | 78% |
| Efficiency at 36 V | 76.5% |
These values are documented in the MTL8000 power-supply literature.
Redundancy and Load Sharing
A significant feature of the 8920-PS-DC is its ability to operate in a redundant power architecture. The MTL8000 documentation states that multiple units can be operated in load sharing, while an additional supply can be used in an N+1 configuration for redundancy. A power-supply fault can also be signaled to the Bus Interface Module.
This configuration is useful for process installations where loss of a single DC supply should not interrupt the associated I/O node.
Hazardous-Area Application
The 8920-PS-DC is specifically associated with the intrinsically safe MTL8000 I/O system. An IECEx certificate identifies the exact 8920-PS-DC with 8724-CA-PS module carrier and specifies hazardous-area intrinsic-safety certification. The certificate documents an ambient range of −40 °C to +70 °C for the certified assembly.
An ATEX supplementary certificate likewise identifies 8920-PS-DC as an IS system power supply, DC input, with module carrier and identifies GE Intelligent Platforms as the manufacturer at the time of certification.
Carrier and Installation
The 8920-PS-DC is not a standalone DIN-rail power supply. It is designed to mount on the 8724-CA-PS carrier. The carrier is part of the node architecture and provides the appropriate mechanical and electrical connections.
The documented unit dimensions are approximately 84 mm wide × 110 mm high × 160 mm deep, with a unit weight of approximately 1.29 kg. The listed shipping weight is approximately 2.3 kg.
Replacement Considerations
For replacement procurement, verify:
| Verification Item | Why It Matters |
|---|---|
| 8920-PS-DC | Confirms the exact power-supply model |
| 8724-CA-PS carrier | Required mounting/interface carrier |
| 24 VDC plant supply | Confirms input-power compatibility |
| 18.5–36 VDC range | Confirms actual supply remains within specification |
| 5 A output requirement | Confirms sufficient node power capacity |
| IS I/O module configuration | Determines actual node power demand |
| Redundant/load-sharing arrangement | Important for high-availability installations |
| Certification requirements | Critical for hazardous-area applications |
| Nameplate/revision | Helps confirm the exact hardware revision |
Do not substitute a conventional 24 VDC power supply merely because its output voltage appears similar. The 8920-PS-DC forms part of an intrinsically safe architecture, and the carrier and certification arrangement must be considered together.
Lifecycle Status
Eaton’s current MTL documentation states that the 8000 2/x power-supply family has been discontinued and provides the information for reference and migration purposes.
The 8920-PS-DC therefore represents legacy process-I/O power hardware, making exact spare inventory relevant for plants that continue to operate /PAC8000 installations.
FAQ
What is GE 8920-PS-DC?
It is an intrinsically safe DC power supply module used in the / GE PAC8000 process I/O architecture.
What is its input voltage?
The nominal input is 24 VDC, with a documented operating range of 18.5–36 VDC.
What is its output?
The module provides 12 VDC with a 5 A capacity.
How many I/O modules can it power?
GE’s product catalog identifies the 8920-PS-DC as an IS module DC power supply for 8 modules. Actual capacity depends on the connected module types and their power requirements.
Does it support redundant operation?
Yes. The documentation specifies load sharing and supports N+1 redundancy using an additional power-supply module.
What carrier does it use?
The documented carrier is 8724-CA-PS.
Is the 8920-PS-DC still manufactured?
The 2/x power-supply family is documented as discontinued, so this is a legacy component.
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GE 8920-PS-DC IS Module DC Power Supply | 24 VDC to 12 VDC, 5 A
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GE 8920-PS-DC intrinsically safe /PAC8000 DC power supply with 24 VDC nominal input, 12 VDC 5 A output, load-sharing redundancy, and 8724-CA-PS carrier mounting.
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